Finally got a pair of prescription sunglasses for summer, but apparently polarised lenses are potentially dangerous for cyclists according to Redditors due to light playing weird tricks on you. On my first day wearing them the only interesting thing I noticed was my phone screen shimmering like a foil trading card
Another interesting thing you can look for is the band of polarized light in the sky created by Rayleigh scattering. Just look anywhere that’s 90 degrees away from the sun.
Not sure if it’s related but I have noticed the entire sky sometimes darkening when tilting my head to the side. Some manhole covers shimmer, so presumably other metal surfaces can do so too. I have another phone which doesn’t have the foil effect, instead the screen just goes black when I turn it sideways. Very cool!